That would be my reason for supporting that the transsexual label be put down as a form of intersex condition, Axelle. It would hopefully draw less enmity from conservative religious groups like that, as well as foster greater sympathy and acceptance and all that jazz.
Lots of people view it as a mere choice - a disgusting one in many cases. I'm tired of my friends losing family over it... breaks my heart every single time. It is only a choice insofar that one must choose between an (often) expensive, dangerous, and (sometimes) humiliating course of action in order to achieve happiness, or a future filled with regret, depression, and potential madness to avoid being an object of some people's hatred.
Transsexuality is often an intersex condition, as far as it currently indicated by research and common sense. The trials are dissimilar to those experienced by other intersex conditions... but such is the nature of anything that would fall under such a wide definition. There are already multiple ways for intersexuality to express itself - transsexuality, a body-brain sexual dimorphism, would merely be another in an already-populated flock.
Being transsexually (new word necessary) intersexed can be as different from reproductively intersexed conditions as androgyny is to transsexualiy is to transvestism under the "transgender" umbrella. I don't think there needs to be fear over what a merge would do to damage the name of classic intersexuality... but I believe there is a lot to gain by it from many individuals.
Mmmm. Time for a snack.